Projection illumination system for tricolor projectors
US5921665A · kind A · utility
0Cited by
15References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 13, 1996 |
| Grant date | Jul 13, 1999 |
| Priority date | — |
| Expiry date | Dec 13, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V5/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A projection illumination system which includes a source light with a projection axis passing generally centrally through this light, and dual-side light-gathering structure, including a reflector and a TIR lens structure generally embracing the source light on opposite sides thereof and along the projection axis, with this light-gathering structure being capable of directing, ultimately outwardly from the source light and unidirectionally along the projection axis, a major percentage of light generated by the source light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.